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Finding the Fourth Proportional to 80,561.97, 120,658.95 and 38,471.67

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Solution

The fourth proportional to 80,561.97, 120,658.95 and 38,471.67 is: 57,619.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,561.97 : 120,658.95 = 38,471.67 : x
  2. Step 2: Convert to fraction form
    80,561.97/120,658.95 = 38,471.67/x
  3. Step 3: Cross multiply
    80,561.97x = 120,658.95 × 38,471.67
  4. Step 4: Simplify right side
    80,561.97x = 4,641,951,306.95
  5. Step 5: Solve for x
    x = 4,641,951,306.95/80,561.97
  6. Step 6: Final answer
    x = 57,619.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.